mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 01:01:06 +00:00
scmi: Add an SCMI SMC transport driver
Using the SCMI transport interface add a new SMC transport to the SCMI stack. Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D43040
This commit is contained in:
Andrew Turner
parent
d46f01fd59
commit
5ea251c4ed
|
|
@ -274,6 +274,7 @@ dev/firmware/arm/scmi.c optional fdt scmi
|
|||
dev/firmware/arm/scmi_clk.c optional fdt scmi
|
||||
dev/firmware/arm/scmi_if.m optional fdt scmi
|
||||
dev/firmware/arm/scmi_mailbox.c optional fdt scmi
|
||||
dev/firmware/arm/scmi_smc.c optional fdt scmi
|
||||
dev/firmware/arm/scmi_shmem.c optional fdt scmi
|
||||
|
||||
dev/gpio/pl061.c optional pl061 gpio
|
||||
|
|
|
|||
131
sys/dev/firmware/arm/scmi_smc.c
Normal file
131
sys/dev/firmware/arm/scmi_smc.c
Normal file
|
|
@ -0,0 +1,131 @@
|
|||
/*-
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*
|
||||
* Copyright (c) 2022 Ruslan Bukin <br@bsdpad.com>
|
||||
* Copyright (c) 2023 Arm Ltd
|
||||
*
|
||||
* This work was supported by Innovate UK project 105694, "Digital Security
|
||||
* by Design (DSbD) Technology Platform Prototype".
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/bus.h>
|
||||
#include <sys/cpu.h>
|
||||
#include <sys/kernel.h>
|
||||
#include <sys/lock.h>
|
||||
#include <sys/module.h>
|
||||
#include <sys/mutex.h>
|
||||
|
||||
#include <dev/fdt/simplebus.h>
|
||||
#include <dev/fdt/fdt_common.h>
|
||||
#include <dev/ofw/ofw_bus_subr.h>
|
||||
|
||||
#include <dev/psci/smccc.h>
|
||||
|
||||
#include "scmi.h"
|
||||
#include "scmi_protocols.h"
|
||||
|
||||
struct scmi_smc_softc {
|
||||
struct scmi_softc base;
|
||||
uint32_t smc_id;
|
||||
};
|
||||
|
||||
static int
|
||||
scmi_smc_xfer_msg(device_t dev)
|
||||
{
|
||||
struct scmi_smc_softc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
SCMI_ASSERT_LOCKED(&sc->base);
|
||||
|
||||
arm_smccc_smc(sc->smc_id, 0, 0, 0, 0, 0, 0, 0, NULL);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
scmi_smc_probe(device_t dev)
|
||||
{
|
||||
|
||||
if (!ofw_bus_is_compatible(dev, "arm,scmi-smc"))
|
||||
return (ENXIO);
|
||||
|
||||
if (!ofw_bus_status_okay(dev))
|
||||
return (ENXIO);
|
||||
|
||||
device_set_desc(dev, "ARM SCMI SCM interface driver");
|
||||
|
||||
return (BUS_PROBE_DEFAULT);
|
||||
}
|
||||
|
||||
static int
|
||||
scmi_smc_attach(device_t dev)
|
||||
{
|
||||
struct scmi_smc_softc *sc;
|
||||
phandle_t node;
|
||||
ssize_t len;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
|
||||
node = ofw_bus_get_node(dev);
|
||||
len = OF_getencprop(node, "arm,smc-id", &sc->smc_id,
|
||||
sizeof(sc->smc_id));
|
||||
if (len <= 0) {
|
||||
device_printf(dev, "No SMC ID found\n");
|
||||
return (EINVAL);
|
||||
}
|
||||
|
||||
device_printf(dev, "smc id %x\n", sc->smc_id);
|
||||
|
||||
return (scmi_attach(dev));
|
||||
}
|
||||
|
||||
static int
|
||||
scmi_smc_detach(device_t dev)
|
||||
{
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static device_method_t scmi_smc_methods[] = {
|
||||
DEVMETHOD(device_probe, scmi_smc_probe),
|
||||
DEVMETHOD(device_attach, scmi_smc_attach),
|
||||
DEVMETHOD(device_detach, scmi_smc_detach),
|
||||
|
||||
/* SCMI interface */
|
||||
DEVMETHOD(scmi_xfer_msg, scmi_smc_xfer_msg),
|
||||
|
||||
DEVMETHOD_END
|
||||
};
|
||||
|
||||
DEFINE_CLASS_1(scmi_smc, scmi_smc_driver, scmi_smc_methods,
|
||||
sizeof(struct scmi_smc_softc), scmi_driver);
|
||||
|
||||
/* Needs to be after the mmio_sram driver */
|
||||
EARLY_DRIVER_MODULE(scmi_smc, simplebus, scmi_smc_driver, 0, 0,
|
||||
BUS_PASS_SUPPORTDEV + BUS_PASS_ORDER_LATE);
|
||||
MODULE_VERSION(scmi_smc, 1);
|
||||
Loading…
Reference in a new issue